Roger H. Davidson is professor emeritus of government and politics at the University of Maryland, and has served as visiting professor of political science at the University of California, Santa Barbara. He is a Fellow of the National Academy of Public Administration. For the 2001-2002 academic year, he served as the John Marshall Chair in political science at the University of Debrecen, Hungary. His books include Remaking Congress: Change and Stability in the 1990's, co-edited with James A. Thurber (1995), and Understanding the Presidency, Third Edition, co-edited with James P. Pfiffner (2003). Davidson is co-editor with Donald C. Bacon and Morton Keller of The Encyclopedia of the United States Congress (1995).

Walter J. Oleszek is a senior specialist in the legislative process at the Congressional Research Service. He has served as either a full-time professional staff aide or consultant to every major House and Senate congressional reorganization effort beginning with the passage of the Legislative Reorganization Act of 1970. In 1993, he served as Policy Director of the Joint Committee on the Organization of Congress. A long-time adjunct faculty member at The American University, Oleszek is a frequent lecturer before various academic, governmental and business groups. He is the author or co-author of several books, including Congress and Its Members, 10th ed. (2006),with Roger H. Davidson, and Congress Under Fire: Reform Politics and the Republican Majority (1997), with C. Lawrence Evans.

Frances E. Lee is associate professor of government and politics at University of Maryland. She has been a Research Fellow at the Brookings Institution and an APSA Congressional Fellow. She coauthored Sizing Up The Senate: The Unequal Consequences of Equal Representation with Bruce I. Oppenheimer, which won the D. B. Hardeman Prize in 1999. Her articles have appeared in American Political Science Review, Journal of Politics, Legislative Studies Quarterly, and American Journal of Political Science, among others.

This fourteenth edition accounts for the 2012 elections and includes discussion of the agenda of the new Congress, White House-Capitol Hill relations, party and committee leadership changes, judicial appointments, and partisan polarization, as well as covering changes to budgeting, campaign finance, lobbyists in legislative policymaking, public attitudes about Congress, reapportionment, rules, and procedural shifts. Always balancing great scholarship with currency, the book features lively case material along with relevant data, charts, exhibits, maps, and photos.